NHTSA Complaint #10455460 — 1997 FORD F-150

TRUCK HAS A 4.2 LITER, V-6 ENGINE. A WEEK PRIOR TO INCIDENT THE TRUCK WAS DRIVEN THEN PARKED IN A MY GARAGE. ON THE INCIDENT DAY I TRIED TO START THE TRUCK BUT HEARD ONLY A LOUD, HARD KNOCK WHEN THE STARTER ENGAGED. THE ENGINE WOULD NOT TURN OVER. THE BATTERY VOLTAGE CHECKED OUT OK. I HAD THE TRUCK TOWED TO A LOCAL REPAIR SHOP. THE STARTER WAS REMOVED AND CHECKED OUT OK ELECTRICALLY. THE MECHANIC MANUALLY ROTATED THE ENGINE BACKWARD 1-1/2 TURNS (HE COULD NOT ROTATE IT FORWARD) THEN TRIED TO START IT BUT THE ENGINE AGAIN MADE A LOUD, HARD KNOCK SOUND. THE MECHANIC THOUGH THE TIMING CHAIN FAILED OR A PUSH ROD WAS BENT. HOWEVER, SINCE THE TRUCK RAN FINE THE LAST TIME IT WAS USED I FELT THE PROBLEM DEVELOPED DURING ITS LAST USE AND LAST COOLDOWN. I CONCLUDED A GASKET FAILED (OR A HEAD CRACKED) ALLOWING COOLANT TO LEAK INTO ONE OR MORE CYLINDERS DURING ITS LAST COOLDOWN. I HAD THE TRUCK TOWED BACK TO MY GARAGE. I REMOVED ALL SPARK PLUGS AND FOUND COOLANT DRAINING FROM THE PASSENGER SIDE FRONT CYLINDER WHICH WAS CAUSING HYDROLOCK. I ROTATED THE ENGINE BACKWARD 4-1/2 TURNS THEN FORWARD 9 TURNS. THE ENGINE NOW TURNED FREELY. A TOTAL OF 4 TO 6 OUNCES OF COOLANT CAME OUT OF THE CYLINDER. I SPOKE WITH A MECHANIC WHO CHECKED THE FORD ALERT SYSTEM AND FOUND A POSTING FOR THE 1997 4.2L V-6 ENGINES THAT INDICATED THEY ARE PRONE TO INTAKE MANIFOLD O-RING FAILURES. I FOUND MANY REPORTS OF SIMILAR FAILURES FOR THIS YEAR AND ENGINE TYPE. I INTEND TO CHECK IN WITH THE LOCAL FORD DEALERSHIP TO GET THEIR TAKE ON THIS PROBLEM AND FIND OUT WHY I WASN'T NOTIFIED ABOUT A "RECALL". *JS